flaw vs foible

flaw and foible both are nouns.

Word	Noun	Adjective	Verb	Adverb
flaw	Yes	No	Yes	No
foible	Yes	No	No	No

As nouns, foible is a hyponym of flaw; that is, foible is a word with a more specific, narrower meaning than flaw:

Other hyponyms of flaw include hamartia, tragic flaw.

flaw (noun)	foible (noun)
an imperfection in an object or machine	the weaker part of a sword's blade from the forte to the tip
defect or weakness in a person's character	a behavioral attribute that is distinctive and peculiar to an individual
an imperfection in a plan or theory or legal document that causes it to fail or that reduces its effectiveness	a minor flaw or shortcoming in character or behavior.

flaw (verb)	foible (verb)
add a flaw or blemish to; make imperfect or defective